Russia and China received immense amounts of US aid.

After the USSR fell, the US was concerned about their nukes proliferating, and gave billions in foreign aid, financial/credit support, and technical assistance to Russia to help them rebuild their economy and maintain nuclear security.

For China, we opened our markets and brought them into the WTO, which massively enriched and empowered their economy and government, and without which they would not have developed nearly as quickly.